Kinematics Question 293

Question: The position of a particle is given by r=(i+2jk) momentum P=(3i+4j2k). The angular momentum is perpendicular to [EAMCET (Engg.) 1998]

Options:

A) 61 sq. unit

B) 59 sq. unit

C) 49 sq. unit

D) 52 sq. unit

Show Answer

Answer:

Correct Answer: B

Solution:

A=j^+3k^ , B=i^+2j^k^

C=A×B

=|i^j^k^013121|

=7i^+3j^k^

Hence area = |C|=49+9+1=59squnit



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